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Los complejos hiperpolarizados de 89Y como pH sensible son probas de RMN sensibles al pH.

Ashish K Jindal1, Matthew E Merritt, Eul Hyun Suh

  • 1Advanced Imaging Research Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, USA.

Journal of the American Chemical Society
|January 28, 2010
PubMed
Resumen
Este resumen es generado por máquina.

Los complejos hiperpolarizados de Yttrium-89 (89Y) se muestran prometedores como sondas sensibles para mediciones de pH in vivo. Sus largos tiempos de relajación T1) permiten una mayor sensibilidad a la Resonancia Magnética Nuclear (RMN) y a la Imagen por Resonancia Magnética (IRM).

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Área de la Ciencia:

  • La resonancia magnética nuclear (RMN) y las imágenes de resonancia magnética (IRM)

Sus antecedentes:

  • La hiperpolarización mejora significativamente la sensibilidad de la RMN/IRM.
  • T(1) el decaimiento de la magnetización limita los experimentos hiperpolarizados.
  • El núcleo hiperpolarizado de Yttrium-89 (89Y) tiene un largo tiempo de relajación T(1), lo que lo hace adecuado para aplicaciones in vivo.

Objetivo del estudio:

  • Para investigar la dependencia del pH del desplazamiento químico 89Y para dos complejos 89Y(III).
  • Demostrar la utilidad de estos complejos como agentes sensibles de espectroscopia/imagen para la medición del pH.

Principales métodos:

  • Síntesis y caracterización de dos distintos complejos hiperpolarizados 89Y(III).
  • Medición del desplazamiento químico 89Y en función del pH.
  • Evaluación del rendimiento de los complejos como sondas sensibles al pH.

Principales resultados:

  • El desplazamiento químico 89Y demostró una clara dependencia del pH para ambos complejos.
  • Se confirmó el largo tiempo de relajación T(1) de 89Y, lo que facilita las mediciones sensibles.
  • Los complejos desarrollados mostraron potencial para una determinación precisa del pH in vivo.

Conclusiones:

  • Los complejos hiperpolarizados de 89Y son agentes efectivos para la espectroscopia e imágenes dependientes del pH.
  • Estas sondas ofrecen un método sensible para el monitoreo no invasivo del pH in vivo.
  • Los agentes basados en 89Y representan un avance prometedor en imágenes médicas y diagnósticos.